So I bought a bottle (well, the gallon size "bottle"!) of Optibond right after reading The THiiNG's review, and have tested it on my Suburban with excellent results! I diluted it 1:1 to see what type of sheen it would produce, and it is a very nice semi-gloss. I cleaned the tires first with power clean at 4:1 dilution, then applied the Optibond with a foam tire dressing sponge applicator. It did last at least two weeks (more like four), as I intentionally overlooked the wheels when washing the car with ONR after two weeks. The deep black of tires was still evident when I washed the tires again, this time a spray of ONR. The application of the Optibond was easier this second time, and the tires are somehow a richer shade of black! The wizardry of Optimum synergy never ceases to amaze me! I have included the Optibond application with four of my clients' vehicles, and each one has remarked on the improvement/enhancement of the sheen and color of their tires. I tried to submit a picture, but it exceeded the bitrate, or something technical . - Sorry, 303, but you are taking a well-deserved rest on my product shelf.